Carcinoma with medullary signs in mammary glands in cats: morphohistological study and immunohistochemical analysis

Breast carcinoma in cats is a serious oncological problem, especially considering that such tumors can cause metastasis to the lymph nodes and other organs. This article considers five cases of carcinoma with medullary signs in cats, of which two have metastases in regional lymph nodes. The morphohistological characteristics of tumors and the results of an immunohistochemical study using NCL and NPM1 markers are analyzed in detail.